Lubricating-bolt.



O. ZERK.

LUBRICATING BOLT.

APPLICATION man .MY 21. m3.

Patented Mar. 14; 1916.

ZZZ

. section of the head portion of the bolt with i ject of the Emperor of Austria-Hungary,

ence being h UNITED STATES PATENT OFFICE.

' OSCAR ZER K, 0F CLEVELAND, OHIO, ASSIGNOR, BY MFSNE ASSIGNMENTS, TO GEORGE W. BOWEN, OIE AUBURN, YQRK.

To all whom it may concern .1

Beit known that I, OSCAR ZERK, a subresiding at Cleveland, in the \-county' of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Lubricating- Bolts, of which the following is a full, clear, and exact description,;ref,erad to the accompanying drawings. V v

This ihvention relates to lubricating bolts ofthe type wherein there is a grease cup carried 'at'the vhead of the bolt Such bolt may be conveniently employed, for example, in connecting the leaves and shackles of I vehicle sprin s.

- near one end, a bore 7 leading axially in The genera object of the inventionis to simplify and cheapen the construction and render the device more eificient. This is accomplished'by makingthe body portion of the bolt whichprovides the journal and the threaded flange thereon which carries the grease cup cap ofseparate pieces of metal suitably secured together, whereby the body may be conveniently case hardened, while the flange may be-of unhardened material adapted to receive the thread I This and other features of the. invention] may be hereinafter more fully explained.

In the drawing, Figure 1 is an axial the grease cup in place thereon; Fig. 2 is a plan or end view of the bolt portion of the A is'a' side elevation of the bolt body alone.

Referring to the "parts, by numerals, 5 designates the body of; the-bolt, which is shown as a solid member having a head 6 ward from the head, and a lateral opening 8 from the bore to the periphery of the bolt, where it is preferably flattened. The head 6 has a polygonal periphery--for example, a hexagon. The planes bounding part of such poly onal head are parallel with the axis of the bolt, but at the inner corner of the head it is recessed or tapered,

as shown at 9;

Surrounding the head 6 is a sleeve 'or flange 10, which extends in the opposite direction from the body and is provided with internal threads 11. The ortion 12 of t 's sleeve which surrounds the angular head 6 "Specification of Letters Patent.

- 24 above the cap.

Patented Mar. 14, 1916.

Application filed May 27, 1918. Serial N 0. 770,159.

of the body is made=similarly angular; that "is to say, both the head and-sleeve are-preferably hexagonal, the sleeve'fitting snugly over the 'periphery of the head. The

rounded portion 10 oLthe sleevehas preferably a'smaller diameter than-the smallest diameter of the portion 12, so that the 'annular shoulder 13 ,is' provided, which bears.

against the outer face of the bolt head 6.

Into the space provided'by the tapered or recessed corner 6 of the bolt head'the end portion of thesleeve 12 is forced ,by upsetting, as shown at 15. By this means the sleeve cheaply and securely locked to the bolt'bo'dy. The boltbody may be formed l ofv 'suitable material and tempered or case 23fengaging the plunger and journaled in the cap and provided with a turning wing To turn the cap into place, its exterior is suitably knurled, as indicated at 26. To lock it when in-place I secure to theface of the head 6 a leaf spring 30, which has a projection 31 adapted to coact with notches 28 on the lower edge of the cap. This spring is preferably annular, or of washer-like form, as shown, described and claimed in my prior japplication No. 758,552. To provide convenient means for holding the spring on the hardened bolt head, I drill a hole inthathead before it is hardened, and then, after the hardening, force a pin 35 through the hole in the spring and into the hole in the head to upof the head, and a cap adapted to engage the sleeve.

beyond the head providing a shoulder bearing against the face of the head, the sleeve being upset against the other face of the head to lock itto the body.

' 3. Ina device'of the character described, the combination of a 'bolt body having an angular headyfa sleeve having an angular portion surrounding the. head and a cylindrical portion extending'from the angular portion, the angular portion being secured to the angular head and the cylindrical portion being provided with threads and a cap coacting with the thread.

4. In a device of the. character described, the combination of a bolt having a body and an angular head; the corner-of which adjacent to the body is reduced, a sleeve having an angular portion surrounding the head, the end ofsaid sleeve being upset onto the reduced portion of the head.

having a cylindrical portion of smaller diameter providing a shoulder bearing against the outer cornerof the head, the end of the sleeve being upset into the reduced' cornerof the head.

6. In a device of the'character described, the combination of a bolt body having a .head, a separate .sleeve surrounding the head and rigidly secured to it and provided with an internal thread, a cap screwing into said thread and having a notched lower edge, and a spring secured to the face of the headand cooperating with the notched edge of the cap.

In testimony. whereof,' I hereunto aflix my signature in the presence of two witnesses.

, OSCAR ZERK. Witnessesz.

BRENNAN B. WEST, GEn'rR oE K'. SMITH. 

